Lifting Analysis for a Sunken Ship in Consideration of Elongation of Crane Ropes

J. Ocean Eng. Technol. 2003;17(3):33-38.

CHOI KYUNG-SIK;SHIN MAENG-KEE;

Division of Ocean Development Engineering, Korea Maritime University;Division of Ocean Development Engineering, Korea Maritime University;

크레인 로프의 신장을 고려한 침몰선체의 인양력 해석

최경식;신맹기;

한국해양대학교 해양개발공학부;한국해양대학교 해양개발공학부;

핵심용어: Marine Accidents 해난사고, Sunken Ships 침몰선박, Salvage 구난, Lifting Force Analysis with 4 Cranes 4기 크레인에 의한 인양력 해석

Abstract

This study focuses on an analytical approach to calculate crane-lifting forces for a sunken ship, with consideration to elongation of crane ropes. The method takes into account the relation of lifting forces acting in wire rope slings to the inclination of the ship's hull, including the effect of lug positions. For lifting analysis, the Euler angles are defined to represent the inclination of a sunken ship in developing the static force and moment equations. An additional compatibility condition is introduced in order to solve an indeterminate lifting analysis problem with 4 cranes. A set of lifting forces along the 4 crane ropes is calculated. A 3-dimensional example of the G/T 1500 oil tanker is analyzed. The results show that the information obtained by the method could be useful to engineers when conducting salvage work.